Omnipay\PayPal\RestGatewayTest::testRefundCapture PHP Method

    public function testRefundCapture()
    {
        $request = $this->gateway->refundCapture(array('transactionReference' => 'abc123'));
        $this->assertInstanceOf('\\Omnipay\\PayPal\\Message\\RestRefundCaptureRequest', $request);
        $this->assertSame('abc123', $request->getTransactionReference());
        $endPoint = $request->getEndpoint();
        $this->assertSame('https://api.paypal.com/v1/payments/capture/abc123/refund', $endPoint);
        $request->setAmount('15.99');
        $request->setCurrency('BRL');
        $request->setDescription('Test Description');
        $data = $request->getData();
        // we're expecting an empty object here
        $json = json_encode($data);
        $this->assertEquals('{"amount":{"currency":"BRL","total":"15.99"},"description":"Test Description"}', $json);
    }